Direct-acting pump



(No Model.)

` J. B. CROCKER.

DIBBGT ACTING PUMP.

No. 571,751. Patented Nov. 24, 1896. l 1 V y 17 1 Wiliy l' 1 A Engis g, wl

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Wtnesses: Inventor I u r ,f z3 mwwvww 7n- 5. B n Attorney iro UNITED STATES PATENT Erice,

JOI'IN I3. OROOKER, OF IIAINIILTON, OHIO.

DIRECT-ACTiNG PUlVl P.

SEGIFICATION forming part of Letters Patent No. 571,751, dated November 24, 1896. Application led April 29, 1896 Serial No. 589,520. (No modell) To r/,H mmm/ if muy (zo/werft:

lle it known that I, JOHN B. CROCKER, of Hamilton Butler county, Ohio, have invented certain new and useful Improvements in Direct-Acting Pumps, of which the following is a specieation.

This invention pertains to direct-acting pumps designed particularly for use in residences in pumping water from the cistern to the attic-tank, the motive power coming from the new of water supplied Jfrom the city waterworlis under pressure. The construction, however, also lends itself to employment in steam-pumps.

In the following specification I have used the term steam, meaning thereby the propeiling agent, the understanding being that it may be steam or water under greater pressure than is to be pumped against. I select the term steam in order to avoid the eonfusion which might arise in the description from speaking of two kinds of Water, that is to say, the water to be pumped and the water to furnish the motive power.

My improvements will be readily understood from the following description, taken in connection with the accompanying drawings, in which- Figure lis a plan of a pump exemplifying my improvements; Fig. 2', a vertical longitudinal section thereof; Fig. 3, a vertical transverse section thereof; Fig. l, an end View thereof 5 Fig. 5, a perspective view of the main and auxiliary ralve dissected, and Fig. (S a perspective view ot' one of the Valve-pistons.

In the drawings, l. indicates the body of the general structure, having a cylindrical forni within and without; 2, a pair of diaphragms in the structure dividing it into three chambers, a central one for the valve and end cylinders for the combined motor and pump; 3, the central chamber for the xnotor-val\'es,open below; i, left-l1and workiugeylinder; 5, righthand working cylinder, the two cylinders being in one axial line; (i, outer end of cylinderji; 7, outer end of cylinder 5; S, inner end of cylinder l; 9, inner end of cylinder' 5; l0, a lining-tube in each of the cylinders i and 5, these tubes seating endwise against the outer surface of thediaphragms 2 and being clamped endwise by the cylinder-heads; 1l, the cylinder-heads; l2, the pistons, one in each cylinexhaust-port 2G g der, the outer surface of each piston forming a pumping-surface, while the inner surface of each piston forms a motor-surface, that is to say, each of the two cylinders furnishes one'end for a double-acting pump and also one end for a double-acting motor; i3, the piston-rod uniting the two pistons and playing through bushings in the diaphragms 2; 14, a seat formed upon the top of the general structure for a water-discharge connection; l5, air-chamber secured to this seat; 1C, ports leadingfrom the discharge-point or air-chamber to the outer ends of the cylinders; l?, discharge-valves at vthe inner ends of these ports where they emerge at scat li, the base of the air-chamber extending inwardly over the chambers in which these valves are seated, so as to limit their lift; 1S, water-inlet; 19, ports placing ports lG in connnunicatien with this water-inlet; 20, suction-valves in ports l0; 2l, plugs over these calves to limit their lift and permit access to them, the water-im let, the seats for valves 20, and the plugs 2l being disposed in a bojelike projection from the general structure at the rear of seat la; 23, a valve-seat bolt-ed below and forming a floor for chamber 2l, steam-inlet to chamber 3; 25, steam-ports from chamber 3 to the inner ends of the two working cylinders, 2G, exhaust-port and connection from chamber 3 through valve-seat 923; 27, a D-valve working upon the upper surface of valveseat and controlling steam-ports 25 and 2S, a cylindrical recess in each end of the body of slide-valve 27, these recesses being open at their outer ends and closed at their inner ends; 2D, steam-ports leading through the top of slide-valve 2T and placing the cylindrical recesses 2S in connnunication with chamber S; 30, exhaustports through slide-valve 27, communicating with the exhaust-pocket of valve 2T and consequently wit-h exhaust-port 2li; 3l, valvepistons, one in each of the recesses 2S in the slide-valve, these pistons being stationary and abutting outwardly against diaphragms 2', 32, pins projecting upwardly from the main-valve seat and engaging iianges on the outer ends of valve-pistons Si and preventing those pistons from moving inwardly, these pins also engaging slots in the lower walls of recesses 2S, which they t sidewise,

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so that the pins may, if desired, form side guides forslide-valve 27 33, auxiliary valve of D type sliding upon the top of main valve 27 and controlling ports 2f) and 30; Si, a tappet on Lasten-rod 13; 35, ears projecting from auxiliary valve to be engaged by tappet 3l; 36, .lugs projecting up from corners of main valve 27 and forming side guides for the auxiliary valve, and 37 lugs projecting :from the side of the auxiliary valve andV adapted to limit the longitudinal motion of the auxiliary valve with reference to the main valve.

Assume the motor is to move, not when steam is admitted to it to operate it, but rather when steam is allowed to exhaust from it. In other words, assume chamber il to be under steam-pressure, and assume exhaust-port 26 to be opened, the pistons and valves being in the position indicated in the drawings. Steam from chamber $3 will go to cylinder-space 0, and steam will exhaust from cylinder-space This moves pistons 12 to the right, forcing water from cylinder-space 7 and drawing water into cylinder-space 0. As the pump completes its stroke ta ppet Si moves the'auxiliary valve and admits steam from chamber 3 to the left-hand one of the cylindrical recesses in the main valve, at the same time opening the right-hand one of those recesses to the exhaust. Steam, acting in the left-hand cylindrical recess ot' the slide-valve, will consequently move the slide-valve to the extreme right, thus reversing the direction of motion of pistons 12. As tappet Si moves the auxiliary valve the lugs S7 engage lugs 36 and give positive movement to the main valve so long as pistons 12 continue to move, steampressure in the recess of the main valve completing the stroke of the main valve if pistons 12 come to rest by rea-son of both ports 25 becoming covered.

Itis to be observed that no moving parts are exposed and that the removal of valveseat 23 gives access to and permits the removal ol' the steam-valve. It is also to be observed that no exterior leakage can occur and that leakage past pistons 12 can never become serious, owing to the fact that both sides of a piston are subject to high pressure when moving in one direction and to low presstiro or no direction. Y

I claim as my invention- 1. In a pump, the combination, substantially as set forth, of a bodystructure having,` two cylinders and an intermediate downwardly-open chamber in a common line, ,t piston in each cylinder with their common piston-rod crossing said chamber, valved water-ports from the outer ends of both cylinders, a ported valve-seat closing the baseopening of said chamber, and a valve below said piston-rod and carried on said seat and arranged to be shifted by said piston-rod. whereby the valve is made removable with the seat.

In a pump, the combination of a cylinder, a chamber at one end thereof, and open below, a piston in the cylinder with its rod working in the chamber, a ported valve-seat closing said chamber, a main valve working on said seat, and having cylindrical recesses and ports, an auxiliary valve working on said main valve and controlling the fluid-pressure in said cylindrical recesses, pistons in said recesses held against motion, and positive engagement between the piston-rod and the auxiliary valve, and between said valve and the main valve, substantially as described.

In a pump, the combination, substantially as set forth, of a cylinder, a valve-seat connected by port therewith, a main valve on said seat and having lugs and ports, cylinders and pistons for moving said main valve, and an auxiliary valve on said main valve said auxiliary valve being directly engaged by the piston-rod and arranged to engage said lugs on the main valve and be moved bythe main piston of the machine.

et. In a pump, the combination, substantiall y as set forth, of a body structure having seat 14 and ports 1G and 19 and water-inlet 18, valves 17 in recesses in said seat, a discharge connection partially closing said valverecesses, valves 2O in recesses in the rear of said seat, and plugs E21 over said last-inentioned valves.

pressure when movin g in the other JOHN 13. CROCKER. Witnesses:

J. W. SEE, SAM D. FITroN, Jr. 

